Tools & Wizards About Us
bilibili.tv screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

bilibili.tv

BiliBili

Page Load Speed

24.7 sec in total

First Response

468 ms

Resources Loaded

22.9 sec

Page Rendered

1.3 sec

bilibili.tv screenshot

About Website

Visit bilibili.tv now to see the best up-to-date Bili content for Indonesia and also check out these interesting facts you probably never knew about bilibili.tv

bilibili是国内知名的视频弹幕网站，这里有最及时的动漫新番，最棒的ACG氛围，最有创意的Up主。大家可以在这里找到许多欢乐。

Visit bilibili.tv

Key Findings

We analyzed Bilibili.tv page load time and found that the first response time was 468 ms and then it took 24.2 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

bilibili.tv performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.9 s

4/100

10%

LCP (Largest Contentful Paint)

Value17.4 s

0/100

25%

SI (Speed Index)

Value9.0 s

14/100

10%

TBT (Total Blocking Time)

Value290 ms

80/100

30%

CLS (Cumulative Layout Shift)

Value0.032

100/100

15%

TTI (Time to Interactive)

Value15.3 s

7/100

10%

Network Requests Diagram

bilibili.tv

468 ms

www.bilibili.com

326 ms

jquery-ui.css

1201 ms

page-core.css

1267 ms

jquery.min.js

1308 ms

Our browser made a total of 132 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Bilibili.tv, 32% (42 requests) were made to I0.hdslb.com and 20% (27 requests) were made to Static.hdslb.com. The less responsive or slowest element that took the longest time to load (20 sec) relates to the external source Tajs.qq.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 839.4 kB (36%)

Content Size

2.3 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Bilibili.tv main page is 2.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 99.2 kB

  • Original 123.6 kB
  • After minification 121.9 kB
  • After compression 24.4 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 99.2 kB or 80% of the original size.

Image Optimization

-6%

Potential reduce by 86.3 kB

  • Original 1.3 MB
  • After minification 1.2 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Bili images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 413.0 kB

  • Original 578.4 kB
  • After minification 571.6 kB
  • After compression 165.4 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 413.0 kB or 71% of the original size.

CSS Optimization

-83%

Potential reduce by 240.9 kB

  • Original 289.8 kB
  • After minification 284.7 kB
  • After compression 49.0 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Bilibili.tv needs all CSS files to be minified and compressed as it can save up to 240.9 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (18%)

Requests Now

97

After Optimization

80

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 97 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bili. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

bilibili.tv

bilibili.tv

468 ms

www.bilibili.com

www.bilibili.com

326 ms

jquery-ui.css

jquery-ui.css

1201 ms

page-core.css

page-core.css

1267 ms

jquery.min.js

jquery.min.js

1308 ms

jquery-ui.min.js

jquery-ui.min.js

1495 ms

base.core.js

base.core.js

1621 ms

index.css

index.css

1196 ms

page.core.js

page.core.js

1305 ms

page.index.js

page.index.js

1304 ms

getHeader

getHeader

100 ms

online.js

online.js

194 ms

picment.min.js

picment.min.js

59 ms

ding-count.json

ding-count.json

354 ms

icons.png

icons.png

306 ms

b-post.png

b-post.png

36 ms

app-link.png

app-link.png

36 ms

app-box.png

app-box.png

303 ms

app-qrcode.png

app-qrcode.png

297 ms

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2081 ms

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2826 ms

slideshow.json

slideshow.json

234 ms

download.png

download.png

1704 ms

icons2.png

icons2.png

138 ms

bangumi-weekday.png

bangumi-weekday.png

494 ms

b-taobao.png

b-taobao.png

139 ms

footpic.gif

footpic.gif

136 ms

wx-arrow.png

wx-arrow.png

138 ms

weibo-qrcode.png

weibo-qrcode.png

139 ms

wx.jpg

wx.jpg

162 ms

tv_animate.png

tv_animate.png

1983 ms

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1889 ms

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1889 ms

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1859 ms

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1977 ms

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1911 ms

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2106 ms

ranking-3day.json

ranking-3day.json

629 ms

promote.json

promote.json

594 ms

12.json

12.json

507 ms

recom

recom

263 ms

ding.json

ding.json

503 ms

1-3day.json

1-3day.json

402 ms

13-3day.json

13-3day.json

347 ms

index-bangumi-timeline.json

index-bangumi-timeline.json

439 ms

nav.js

nav.js

643 ms

index-icon.json

index-icon.json

418 ms

getSearchDefaultWords

getSearchDefaultWords

909 ms

loc

loc

588 ms

loc

loc

507 ms

loc

loc

586 ms

loc

loc

503 ms

rec.js

rec.js

893 ms

bfd.js

bfd.js

972 ms

stat.php

stat.php

1752 ms

stats

stats

19954 ms

loading.gif

loading.gif

72 ms

41.json

41.json

1641 ms

api_proxy

api_proxy

1326 ms

20.json

20.json

508 ms

21.json

21.json

630 ms

31.json

31.json

703 ms

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286 ms

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1464 ms

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1490 ms

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1343 ms

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1371 ms

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1494 ms

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1370 ms

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1452 ms

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1453 ms

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1342 ms

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1452 ms

transparent.gif

transparent.gif

183 ms

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img_loading.png

180 ms

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1684 ms

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2896 ms

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2104 ms

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1943 ms

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1849 ms

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1853 ms

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1970 ms

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1912 ms

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1985 ms

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2420 ms

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2088 ms

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2092 ms

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2116 ms

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2142 ms

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2128 ms

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2132 ms

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1355 ms

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1425 ms

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1507 ms

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1959 ms

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1402 ms

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1413 ms

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2115 ms

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2107 ms

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1956 ms

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1278 ms

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1330 ms

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1469 ms

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90 ms

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2038 ms

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2001 ms

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2014 ms

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1435 ms

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1299 ms

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1310 ms

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1716 ms

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1990 ms

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2038 ms

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1254 ms

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1388 ms

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1431 ms

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1845 ms

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165 ms

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1980 ms

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2045 ms

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1986 ms

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424 ms

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1572 ms

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876 ms

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1225 ms

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849 ms

stat.htm

stat.htm

394 ms

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842 ms

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841 ms

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819 ms

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793 ms

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778 ms

Accessibility Review

bilibili.tv accessibility score

62

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

bilibili.tv best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

bilibili.tv SEO score

77

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Bilibili.tv can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Bilibili.tv main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

bilibili.tv

Open Graph description is not detected on the main page of Bili. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: